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Financial Instruments - Impact of COVID-19 Pandemic - Additional Information (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Mar. 31, 2020
Cash and Cash Equivalents, Other Investments and Term Deposits [Member]    
Disclosure of Fair Value Measurement [Line Items]    
Assets carried at amortized cost $ 450,088 $ 168,010
Trade and Other Receivables [member]    
Disclosure of Fair Value Measurement [Line Items]    
Assets carried at amortized cost 27,331 56,065
Level 3 [Member]    
Disclosure of Fair Value Measurement [Line Items]    
Financial assets, at fair value $ 5,409 $ 3,584